Home / 1,274.38-1,745.92-1,225.17

Finding the Fourth Proportional to 1,274.38, 1,745.92 and 1,225.17

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Solution

The fourth proportional to 1,274.38, 1,745.92 and 1,225.17 is: 1,678.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.38 : 1,745.92 = 1,225.17 : x
  2. Step 2: Convert to fraction form
    1,274.38/1,745.92 = 1,225.17/x
  3. Step 3: Cross multiply
    1,274.38x = 1,745.92 × 1,225.17
  4. Step 4: Simplify right side
    1,274.38x = 2,139,045.74
  5. Step 5: Solve for x
    x = 2,139,045.74/1,274.38
  6. Step 6: Final answer
    x = 1,678.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.